“It is only one poll, but in a rather unexpected reverse of polling assumptions so far, both our phone poll and our online poll are consistent on both vote intentions and on the EU referendum, " he said.

The polls were released as Boris Johnson and the campaign to Leave the EU was accused of indulging in “fantasy politics” after making more than £100 billion in spending commitments it is unlikely to meet.

But the rival Stronger In campaign responded by arguing the claims ring hollow since the Vote Leave has made £111bn in spending promises - more than ten times the net £10bn saving they claim would be made on a ‘Yes’ vote.